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21 July 2012, 09:17
The music world has been reacting to the tragic news which left 12 dead and 50 injured after cinema screening in Colorado.
Justin Timberlake has taken to Twitter to offer his prayers for the victims and families of those involved in the shootings which took place at a midnight screening of the new Batman film The Dark Knight Rises in Colarado this week.
The 'What Goes Around' singer is among a great number of celebrities and musicians who have delivered messages on their social network platforms in the past couple of days.
"So saddened to hear of the tragic theatre shooting last night in Aurora, Colorado. Sending my prayers to the victims and their families," he tweeted.
R&B star Jason Derulo also expressed his sadness at the news encouraging fans to show their support.
"My Prayers are going out to the families affected by the Colorado shooting... RT," he added.
Rihanna, who is currently enjoying a cruise around Italy, retweeted a message made by NBA basketball star LeBron James.
It read: "Its just not fair that innocent people have to lose their lives over someone's selfish stupidity acts! My stomach is hurting over this."
You can view a still from The Dark Knight Rises below:
Police are currently investigating the mass shooting which took place in Aurora, Colarado and have arrested 24-year-old James Holmes.
"Sophisticated" explosives and "booby-traps" have been found at the suspects home as police admit they could be at the apartment for days.
US President Barack Obama said he was "shocked" and "saddened" by the tragic news - which left 12 dead and another 50 injured - as he addressed the nation yesterday (20th July).
"We will take every step possible to ensure the safety of all of our people. We're standing by our neighbors in Colorado during this extraordinarily difficult time," he said.